Type-writing machine.



W. E. BARNARD.

TYPE WRITING MACHINE.

APPLIOATION FILED MAB.17, 1 -0.

Patentad Nov. 8, 1910.

, Hartford,

isa speeili- 'ation.

. and 4.

UNITED STATES PATENT OFFICE. i

I WALTER E. BARNARD, 0F HARTFORD, CONNECTICUT, ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

To all who're-it may concern:

.lie it known that l, 'Arirnn l). Maximo, a,-eiti'/ en ol the lluited States, residing'in in the eouhty ot [larttord and State of ()onnei-tieut, have inventedeertain new and useful lm n'ovemeuts in Typeriting, lilaehines, of whieh the followil'ig This invention relates to the 'earriage driving spring drums for ty 'ien'riting inachines, in which two. dock-springs are eonn eeted togg'ethei'. and provision is made for raryiugtlie tension or pull on the carriage, flhe objert ot' the invention is to provide a simple and inexpensive and improved de- \'i ee to]: this purpose, readily applieable to existing maehines.

. In the ;l(. ('0l1t1)tt1)j'lHg drawings, Figure 1 is a perspeetive view showing the motor in section and with partsbroken a way. Fig. 2 is a rear elevation, partly broken a way. of the di 'u|n. Fig. 3 is a vertieal longitudinal seetio'nal riew ol" thesame with the s ring uuwomuh l ipg. lis a similar view with the spring wound up. Fig}?! is'a detail perspot-tire view of theseparated parts of the motor. v

'lhe referent-e numeral 1. marks part 01 the Frame ot"a t vpewriling machine: 2, a carriage guide rod: 3%. a part of the paper earriag'e: t. a strap eounertiug the earriage l with a spring-drum 5. eonneeted by a hraeket ti witlrthe frame I. The foregoing parts are or may be o'l' any known or suitable eonstriwt'ion.

The drum 5 is mounted for rotation relativel'r to a shaft. 7', being eouneeted with said shaft. by a ImlLbea-ring 8, or otherwise. The shaft-7 is journaled in the braeket l3, and is provided with a sleeve 9 fast thereto. .\t one end of'sleeve t is a ratehetwlieel l0, and two disks It, 12, \\'itlil e\'eled edges are att-achedto the other end ot' said sleeve 9 and form ptirt oi the ball-bearing named above. A handle 13 is attaehed to the. end of shatt' 7 by a screw 14. the bearingin the braeket (3 for the shaft 7 being between the rat'rhet wheel 10 and handle 13, as shown in Figs. 2 The handle thus looks the shaft 7 in place in its hearing in the bracket. (3. The outer end otf'a clerk-spring 15 is attached in any suitable way to the inside of the flange of drum 5, the inner end of said spring 15 being caught over a hook It? on a stem-fie 17, or being otherwise suitably eouneeted, to said Specification of Letters Patent.

Application filed March 17, 1910.

Patented Nov. 8, 191.0. Serial No. 649,968;

sleeve 17, which loosely mounted on said shaft 7. The sleeve 17 has another hook l8 thereon. which hook 18 points oppositely to the hook it), and the inner end of a clockspring It) hooks over hook 18, the outer end o't' said spring 19 being attached in any suitable way, as by a hook it), tothe inner fare of the flange Q1 of a drum 22, The hub .23 of drum :2 is made fast in a suit-- able manner, as by a set-screw 24, to the end of the shaft 7'. A dog 25 e0-aets with the ratchet-wheel 10 to prevent the springs t'rom rotating said shaf The parts named are so arranged and assembled. that. the. springs as they attempt to unwind, tend to toward the drums 5, and to 'n'i'ore said carriage when the machine is operated in the usual Way. The dog is shown as hei'ng pivoted at 26 on the bracket- 6,'a nd drum 5 1s shown with Hie-peripheral groove 27 to reeeive the strap 4. Axdis'k gsmayybe and pre't'erahtr is l-uouii'ted' mate-sleeve I7 between the drums 5 and 2:2, as a precaiition against entanglelnent' ot the was oi" the (dock-springs, and as a cover to keep dirt. out; The disk is perforated at 29 to go over the. sleeve 17, and itmay .tittightly on said sleeve, being notehed at 30 so as to slip by or over one at the hooks 16. 19. in assembling. it is remarked that the swings l5 and t9 tend to rotate their respeetive drums in 0] posite direetious, so the eonst'ruetion amounts to connecting the inner end of spring'lti to the flange 21 of drum 22, or to connecting said inner end by a spring to a fixed abutment. The tension may be va ried by rotating shaft 7 one. way or the other in the usual manner. By reason of this eonstriurtion' of springs, the barrel 21 may remain stationary during the carriage movements, only the single barrel 5' being in motion, which is a desideratum, as it is necessary to reduce the .n'iovin Weight: to a mininnun, in order to fulfil tie requirement of speed and ease of operation.

I'la-viug thus described my invention, I claim 1, In a typowriting machine, the eombination with thecarriage, of a. spring-drum consisting of two springs arranged side by side but. reversely, a rotary coupling to which the inner ends of said springs are connected, a Shaft oxrwhieh said coupling draw the carriage )1 is loosely mounted, a drum fast on said shaft, the outer end of one of said springs being fast to said drum, a drum loose on said shaft, the outer end of the otherspring beingbfest to said loose drum, and a connection etween' sald loose drum and the carriage.

2. In a typewriting machine, the combination with the carriage, of a spring-drum consisting of two springs arranged side by side but reversely, a rotary coupling to which the inner ends of said spring are connected, a rotary shaft on which said coupling is loosely monnted, a bracket provided with a bearing for said shaft, a ratchet-Wheel on said shalt at'one side of said bearing and an operatin lever on said shaft at the other side of salt 'bearin a drum fast on said shaft and having the outer end of one of said springs fast thereto, a' drum loose on said shaft and having the outer end of the other s 'n'ing jast thereto, and connections hetweei'i said loose drum and said carriage.

In a typewriting machine, the combination with the carriage, of a spring-drum eol'isisting of two reverse clock,-spirine's whose inner ends are connected together, a shaftpassing through said springs,"a 1 RH; ing forsaid shaft, a shaft-turning lever :n one side of said bracket and-a ratchet-wheel on said shaft at the other side thereof, one

unemberof a ball-bearing adjacent to said ratchet-wheel, a drum provided with the other member of the ball-bearing, connections between said drum and the carriage, and a drum fast on said Hllilft,*tl-1C outer endsof said springs'heing connected to said drums.

t, In a typewriting machine, the coinbi nation with the carriage, of a spring-drum consistin of reverse clock springs Whose inner ems are connected with each other. a shaft passing through said springs, a bearing for said shaft, a ratchet-wheel on said shaft at one side and a shaft-operating lever on said shaft at the other side of said hearing, a drum fast to said shaft, a drum loose on said shaft, the outer ends of said springs being connected to said drums, and connections between said loose drum and said earriage.

5. In a typewriting machine, the (oin hination with a carriage, of two reversely coiled sprin s connected at their inner ends,- means for ioldin'g the 'outer end of one coiled springstatit'inary, and means for conneeting the outer end of the other coiled springio the carriage.

(3. In a typewriting machine, the ('(Hllllination with a carriage, of two revorselr coiled springs, a revokihle sleeve to which the inner ends of the springs are reversely connected, means for holding the outer end of one coiled spring stationary, and means for connecting the outer end (if the other coiled spring to the carriage.

v 7. In a typeuriting machine, the combinationwith a.- carriage, of two reversel r roiled springs connected at their inner ends. a fixed easing int-losing one of said springs, means for turning said casing to adjust the tension, and means for connecting the outer end of the other .coiled spring to the rarriage. I V WALTER It], BXRNARI). Witnesses W. M. BYORKMAN, Lmmx 1). BHOUGII'JON. 

